function test() {
    var x = "";
    var d = new Date().getDay();
    switch (d) {
        case 0:
            x += "今天是星期日";
            break;
        case 1:
            x += "今天是星期一";
            break;
        case 2:
            x += "今天是星期二";
            break;
        case 3:
            x += "今天是星期三";
            break;
        case 4:
            x += "今天是星期四";
            break;
        case 5:
            x += "今天是星期五";
        case 6:
            x += "今天是星期六";
            break;
        default:
            x += "今天啥也不是";
            break;
    }
}
